<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <?php
      echo "<h1>一个标题</h1>";
      echo "欢迎光临，今天是：";
      echo date("Y年m月d日");
    echo date("星期 w");
    ?>
</body>
</html>